Buoy your idea with the help of others. Photo of colorful buoys by Flickr user hermanturnip (Creative Commons).

Competition makes the world go round, and pushes us to make good ideas even better. Here are some folks who want you (yes, you!) to throw your hat in the ring for a little—er, a lot—of support:

MIT’s IDEAS Competition. Grab your fellow world changing nerds, reach out to a community partner and come up with a solution to a problem of your choice. (Caveat: one third of all teams must attend MIT.) If you want to win $10,000, get your proposal in by February 5.

Yoxi’s “Balance Your Digital Diet” Competition. Curbing digital addiction – can it be done? Yoxi, a hip social game, invites you to slim down on tweeting, Facebooking, emailing, and more. Register your team by February 7 to be in the running for up to $40,000.

Toyota Ideas for Good Contest. From a solar powered ventilation system to advanced injury simulation, the Japanese car company has implemented some pretty awesome technologies in its vehicles. The challenge? Use ‘em to drive change outside the automotive world. Deadline to submit and win your own ride is February 28.

PopTech’s Social Innovation Fellows. Are you an ambitious changemaker with a bright idea? Nominate yourself, or someone you know, for the chance to gain tools, skills and contacts in the social entrepreneurship field, as well as an opportunity to speak on stage at PopTech’s annual conference. Nominations close March 11.